DEVICE FOR CONTACT-IMPEDANCE TESTING OF ARTICLES Russian patent published in 2005 - IPC

FIELD: testing engineering.

SUBSTANCE: device comprises electroacoustical rod resonator with indenter and unit flange, loading unit connected with the exiting amplifier-generator system, resonator vibration pickup, measuring unit with indicator, and drive and damper for control of the resonator velocity. The unit flange of the resonator is connected with the bottom surface of the rectangular frame, two sides of which are connected with the loading unit made of two calibrated springs secured to the housing. The two other sides are connected with the spring-loaded slides provided with rubber bearings or small rubber wheels which can freely reciprocates along the normal to the frame and generatrix of the housing. The top beam of the frame is connected to the drive comprising two hooks which are disengaged upon touching the indicator of an article to be tested. One of the hooks is connected with the frame, and the second hook is connected with the rigid printed circuit board of the excitation system. The board is also used for transmitting motion. The opposite side of the board is rigidly connected with the rod of the viscous friction damper. The other end of the rod is connected to the spring-loaded mushroom-shaped head. The head is mounted for reciprocation with respect to the housing and is fixed with respect to the housing with the use of two locators, which are set in the slots of the housing.

EFFECT: enhanced reliability of testing.

2 cl, 2 dwg